It's well known that earthworms increase soil fertility and carbon storage by mixing in dead plant material. However, data about earthworms is severely lacking and this is particularly so in urban areas, despite the large percentage of urban space taken up by gardens and green spaces.
The data you have submitted demonstrates that the highest density of earthworms was in lawns, probably because they are less disturbed by digging. However there were also high densities of earthworms in vegetable beds. These are regularly dug over and contain a high degree of nutrients, including organic matter.
This is great news for families and gardeners who manage a vegetable patch and dig in organic matter such as well-rotted manure, compost, leaf-mould, or compost bark.
You can find out more about the results of the survey from the Earthworm Watch website:
Although the survey has now closed for data submission, you can still undertake the survey as an educational or family fun activity.